Compilare: user.cpp: In function ‘char* get_string(long long int)’: user.cpp:15: warning: address of local variable ‘s’ returned user.cpp: In function ‘int binsearch()’: user.cpp:70: warning: suggest parentheses around assignment used as truth value user.cpp:85: warning: no return statement in function returning non-void user.cpp: In function ‘int main()’: user.cpp:91: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:92: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:96: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result